watson guerrant



G. W. GUERRANT. COMBINED s UARB AND OALIPER- No. 78,591. Patented June2, 1868.

C.-WAT SON GUERRANT, 'OF LEAKSVILLE, NORTH CAROLINA.

Letters Patent No. 78,591, dated June 2, 1888.

COMBINED SQUARE AND GALIPERS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, G. WATSON GUERBANT, of Iieaksville, in the county ofRockingham, and State of North Carolina, have invented certain new anduseful Improvements in Carpenters Tools; and I do hereby declare thatthe following is a full, clear, and exact description thereof referencebeing bad to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

Figure 'lrrepresents u front view of my improved machinists tool; and IFigure 2 a back view of the same.

The nature of my invention consists in constructing a tool which can beused either as inside calipers, outside calipers, try-square,bevel-gauge, compasses, or rule, and combiningrin one simpleinstrumentthe properties of the six above named. I

My improved machinis'ts tool is composed of two bars of brass-or othersuitable metal, ,A B, united near their centres by the pivot l). Thebars are each out half way through, so that their top and bottom edgeswill always heflush. A slotted arm, G, is pivotedto one end of the barA, and a set-screw, b, on the adjacent end of the bar B moves in theslot u of the arm 0. A curved slot, a, with radius struckfrom the centreof the pivot ii, receives the set-screw b when the tool is used as abevel-gauge.

It will be seen that the edges x x of the dcpressionsmade in the bars AB are square with the sides of the bars, so as to holdthem at rightangles when used as a try-square. I

e 0 represent the compass-points,ff the inside caliper-points, and g gthe outside caliper-points. H is the rule.- The divisionsmarked upon theslotted arm O render the outside calipers self-registering.

To us'e the tool as a try squar'e, the bake A B are moved upon the pivotuntil their sides strike the edges :2: x, which causes the angles at aand b to be right angles. When used as a bevel-gauge, the bars andB areclosed, and the slotted arm ,0, working upon the pivot d, can be set atany desired inclination, and retained byth'e set-screw b. v

The manner of using the compasses, inside'and outsidecnlipers, and ruleis self-evident upon inspection, being the same as in ordinary use, butit will be remarked that the outside calipers are made self-registeringby the gauge marked'upon the slotted arm 0. I 7

Having thus fully described my invention, what I claim therein as new,and desire to secure by Letters Patent, is- I The combination of thebars A audit, and slotted mm C, arranged and operating as'described, forthe purposes set forth.

In 'testimonythat I claim the foregoing as my own, I afiix my signaturein presence of two witnesses.

I G. WATSON GUERRANT.

Witnesses:

,T. M. HAMLIN, J. TURNER Monnumn.

